Pet bathtub



FIG. 1 is a perspective view of a pet bathtub showing the claimed design;

FIG. 2 is a top plan view thereof

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is an enlarged detail view as designated in FIG. 7; and,

FIG. 9 is an enlarged detail view as designated in FIG. 2.

The broken lines illustrate portions of the pet bathtub that form no part of the claimed design. 

CLAIM The ornamental design for a pet bathtub, as shown and described. 